Multicellular organisms are composed of many cells that are specialized to perform different tasks. This allows them to carry out complex activities that would be impossible for a unicellular organism. For example, multicellular organisms can move, reproduce, and respond to their environment. They can also develop specialized tissues and organs, which allow them to perform even more complex functions.
Unicellular organisms, on the other hand, are relatively simple organisms that are made up of just one cell. They can only perform a limited number of functions, and they are not as well-adapted to their environment as multicellular organisms.
In conclusion, multicellular organisms are more advanced than unicellular organisms because they have a higher level of organization, can perform a wider variety of functions, and are better-adapted to their environment.
